<template>
    <div>
        <!-- 面包屑 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
                </el-col>

            </el-row>
            <!-- 表格 -->
            <tree-table class="treetable" :data="catelist" :columns="columns" :selection-type="false"
                :expand-type="false" :show-index="true" index-text="#" border><!-- :show-row-hover="false"高亮显示 -->

                <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen;"></i>
                    <i class="el-icon-error" v-else style="color: red;"></i>
                </template>
                <template slot="order" slot-scope="scope">
                    <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
                    <el-tag size="mini" type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
                    <el-tag size="mini" type="warning" v-else>三级</el-tag>
                </template>
                <template slot="opt" slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini"
                        @click="shouEditGoods(scope.row.cat_id)">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini"
                        @click="removGoodsById(scope.row.cat_id)">删除</el-button>
                </template>
            </tree-table>
            <!-- 分页 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
                :current-page="querInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="querInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper" :total="total">
            </el-pagination>
        </el-card>
        <!-- 分类对话框 -->
        <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%" @close="addCateDialogClosed">
            <!-- 添加分类表单 -->
            <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">

                <el-form-item label="分类名称：" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类：">
                    <el-cascader v-model="selectedKeys" :options="ParentCateList" :props="{
                        expandTrigger: 'hover',
                        ...cascaderProps,
                        checkStrictly: ' true'
                    }" @change="parentCateChanged" clearable></el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addCateDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 编辑 -->
        <el-dialog title="修改分类" :visible.sync="editGoodsVisible" width="50%" @close="editGoodsClosed">
            <el-form :model="editCateForm" :rules="editCateFormRules" ref="editFormRef" label-width="80px">
                <el-form-item label="分类名称" prop="cat_name">
                    <el-input v-model="editCateForm.cat_name" ></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editGoodsVisible = false">取 消</el-button>
                <el-button type="primary" @click="editGoodsInfo">确 定</el-button>
            </span>
        </el-dialog>


    </div>
</template>

<script>
export default {

    data() {
        return {
            //查询条件
            querInfo: {
                type: 3,
                pagenum: 1,
                pagesize: 5
            },
            //商品分类数据列表
            catelist: [],
            //总数居条数
            total: 0,
            //为table指定列
            columns: [{
                label: '分类名称',
                prop: 'cat_name',
            },
            {
                label: '是否有效',
                //当前列定义为模板列
                type: 'template',
                //当前列这样使用模板名称
                template: 'isok'

            },
            {
                label: '排序',
                //当前列定义为模板列
                type: 'template',
                //当前列这样使用模板名称
                template: 'order'
            },
            {
                label: '操作',
                //当前列定义为模板列
                type: 'template',
                //当前列这样使用模板名称
                template: 'opt'
            }
            ],
            //分类对话框显示
            addCateDialogVisible: false,
            //添加分类表单数据对象
            addCateForm: {
                //将要添加的分类名称
                cat_name: '',
                //父级分类id
                cat_pid: 0,
                //分类等级，默认为一级
                cat_level: 0
            },
            //添加分类表单的验证规则对象
            addCateFormRules: {
                cat_name: [
                    { required: true, message: '请输入分类名称', trigger: 'blur' }
                ]
            },
            //父级分类列表
            ParentCateList: [],
            //指定级联选择器配置对象
            cascaderProps: {
                value: 'cat_id',
                label: 'cat_name',
                children: 'children'

            },
            //选中的父级分类的id数组
            selectedKeys: [],
            editGoodsVisible: false,
            editCateForm: [],

            editCateFormRules: {
                cat_name: [
                    { required: true , message: '请输入分类名称', trigger: 'blur' },
                ]
            },

        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        //获取分类数据
        async getCateList() {
            const { data: res } = await this.$http.get('categories', { params: this.querInfo })
            if (res.meta.status !== 200) {
                return this.$message.error('获取数据失败')
            }
            // console.log(res.data)
            // 数据列表幅值给catelist
            this.catelist = res.data.result
            this.total = res.data.total
        },
        //监听pagesize改变
        handleSizeChange(newsize) {
            this.querInfo.pagesize = newsize
            this.getCateList()
        },
        //监听pagenum
        handleCurrentChange(newpage) {
            this.querInfo.pagenum = newpage
            this.getCateList()
        },
        //点击展示分类对话框
        showAddCateDialog() {
            //获取父级分类数据
            this.getParentCateList()
            this.addCateDialogVisible = true

        },
        async getParentCateList() {
            const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
            if (res.meta.status !== 200) {
                return this.$message.error('获取父级分类数据失败')
            }
            console.log(res.data)
            this.ParentCateList = res.data
        },
        //选择项发生变化时触发
        parentCateChanged() {
            // console.log(this.selectedKeys)
            //如果seletedKeys 中length大于0，则有选中父级分类，反之没有选中
            if (this.selectedKeys.length > 0) {
                this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
                this.addCateForm.cat_level = this.selectedKeys.length
                return
            }
            else {
                this.addCateForm.cat_pid = 0
                this.addCateForm.cat_level = 0
            }
        },
        addCate() {
            // console.log(this.addCateForm)
            this.$refs.addCateFormRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.post('categories', this.addCateForm)
                if (res.meta.status !== 201) {
                    return this.$message.error('添加分类失败')
                }
                this.$message.success('添加分类成功')
                this.getCateList()
                this.addCateDialogVisible = false
            }
            )
        },
        //监听添加分类对话框关闭事件
        addCateDialogClosed() {
            this.$refs.addCateFormRef.resetFields()
            this.selectedKeys = []
            /*             this.addCateForm.cat_level = 0
                        this.addCateForm.cat_pid = 0 */
        },
        //编辑按钮
        async shouEditGoods(id) {
            console.log(id)
            const { data: res } = await this.$http.get('categories/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询商品信息失败')
            }
            this.editCateForm = res.data
            this.editGoodsVisible = true

        },
        //修改提交
        editGoodsInfo() {
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.put('categories/' + this.editCateForm.cat_id,
                    {
                        cat_id: this.editCateForm.cat_id,
                        cat_name: this.editCateForm.cat_name,
                    })
                if (res.meta.status !== 200) {
                    return this.$message.error('更新商品分类信息失败')
                }
                // 关闭
                this.editGoodsgVisible = false
                // 刷新
                this.getCateList()
                // 提示成功
                this.$message.success('更新商品分类信息成功')
            })

        },
        editGoodsClosed() {
            this.$refs.editFormRef.resetFields()
        },
        //删除
        async removGoodsById(id) {
             console.log('此处' + id)
            //弹窗
            const confirmResult = await this.$confirm('此操作将永久删除该分类, 是否继续?',
                '提示',
                {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)
            // 确认删除返回confirm,取消返回cancel
            // console.log(confirmResult)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            const { data: res } = await this.$http.delete('categories/' + id)

            if (res.meta.status !== 200) {
                return this.$message.error('删除失败')
            }
            this.$message.success('删除成功')
            this.getCateList()

        },
        
    }
}
</script>

<style lang="less" scoped>
.treetable {
    margin-top: 15px;
}

.el-cascader {
    width: 100%;
}
</style>